Maciej Gąbka

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The Charales (stoneworts) are an ancient monophyletic group with conserved features same in ancesters as well as in present representatives. They are considered to be closely related to the ancestors of land plants. The taxonomy of Charales was delimitated on the basis of morphology and later by fossil characters as well. Nowadays, the higher taxa are(More)
In Chlebowo mire (Wielkopolska region), we investigated testate amoebae in relation to 10 environmental parameters in the semi-natural floating vegetation of flooded peat workings. The measured parameters included: depth to water table (DWT), ground-water pH, color, conductivity, PO4, NO3, NH4, SO4, Ca, and Mg. Detrended correspondence analysis and(More)
We studied the vegetation, testate amoebae and abiotic variables (depth of the water table, pH, electrical conductivity, Ca and Mg concentrations of water extracted from mosses) along the bog to extremely rich fen gradient in sub-alpine peatlands of the Upper Engadine (Swiss Alps). Testate amoeba diversity was correlated to that of mosses but not of(More)
We investigated species composition and relative abundance of Sphagnum fallax dominated peatlands in relation to measured environmental variables on the basis of 26 sites in the Wielkopolska region. Most studied plots were characterized by soft waters, poor in Ca2+ but rich in nutrients, especially N-NH4 + and P-PO4 3-, with high electrolytic conductivity(More)
In Europe peatlands are wetlands of postglacial origin. Because of climatic changes and agricultural activities (i.e. drainage and peat extraction), they are one of the most endangered ecosystems worldwide. Water mites are well known as indicators of changing environments in other ecosystems such as springs and lakes. For our study we selected seven(More)
The study presents habitat and phytosociological analyses of the Chara intermedia phytocenoses, rare described in Europe. 16 physico-chemical water parameters were analysed, coming from the samples taken in 20 phytocenoses of 13 lakes located in western Poland. The analysed community appeared in naturally shallow lakes representing last stages of the(More)
Understanding the influence of environmental factors on the hydrobiota structure of small aquatic ecosystems is essential for effective landscape management. In this study of 165 small water bodies situated in the lowland high-productive agricultural landscape of western Poland we evaluate the effect of catchment, buffer zone, water body and water quality(More)
The objective of this study was to examine the impact of aluminium on the perennial macroalgae Chara hispida L. and its bioaccumulation capacities. Aluminium (Al) was introduced into the environment in the form of polyaluminium chloride, an agent utilized in the restoration of waterbodies. Research was conducted in an experimental setting using mesocosms(More)
We investigated morphological response of yellow water-lily and arrowhead to water velocity gradient in the lowland Wełna river (Western Poland). Percentage cover of floating and submerged forms of yellow water-lily and arrowhead had been measured in randomly selected sites of 16 m2. We analyzed 62 stands of Nuphar lutea and 80 stands of Sagittaria(More)
a Laboratory of Soil Biology, Institute of Biology, University of Neuchâtel, CH‐2000 Neuchâtel, Switzerland b Swiss Federal Research Institute WSL, Ecosystem Boundaries Research Unit, Wetlands Research Group, Station 2, CH‐1015 Lausanne, Switzerland c Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratoire des Systèmes Ecologiques, Station 2, CH‐1015(More)